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参数资料
| 型号： | LA4590W |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 0.021 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP48 |
| 封装： | 0.50 MM PITCH, SQFP-48 |
| 文件页数： | 5/19页 |
| 文件大小： | 538K |
| 代理商： | LA4590W |
Function Descriptions
1. The input amplifier has an inverting structure. The gain and the high pass filter characteristics are adjusted by an
external CR circuit that determines the input impedance.
2. The AMS comparator outputs pulses for input waveforms that fulfill certain conditions (frequency and voltage level).
3. Connect pins 24 and 25 to Vref (pin 33) if the AMS function is not used.
Ripple Filter
1. The ripple filter SVRR is adjusted with the external capacitor connected at pin 44.
3.3 F
→ 39 dB
4.7 F
→ 42 dB
10 F
→ 47 dB
2. Leave pins 43, 48 and 1 floating if ripple filter 1 is not used.
3. We recommend using a 2SB1295 of rank 6 or higher as the external transistor.
Power Output
1. The power amplifier and common amplifier outputs are connected by resistances of about 160
.
Power Muting
1. The power muting function turns off the fixed current supplied to the power block.
2. The output DC voltage when the power muting function is on is the Vref potential (0.75 V).
3. The output impedance when the power muting function is on is about 10 k
.
Preamplifier Muting
1. The preamplifier muting function turns off the fixed current supplied to the preamplifier block.
2. The output DC voltage when the preamplifier muting function is on is the Vref potential (0.75 V).
3. The output impedance when the preamplifier muting function is on is determined by the NAB constants.
No. 4468-13/19
LA4590W
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